P0155 – O2 Sensor Heater Circuit Malfunction Bank 2 Sensor 1: Oxygen sensors (O2S) or heated oxygen sensors (HO2S) need to reach a minimum operating temperature of 750 degrees Fahrenheit to produce an ...
P0161 – HO2S Heater Performance Bank 2 Sensor 2: The Powertrain Control Module (PCM) supplies a bias voltage (approximately 450 mV) on the Heated Oxygen Sensor (HO2S) signal high and low circuits.
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